Thanks for the information. On 4/11/08, Branislav Kusy <[EMAIL PROTECTED]> wrote: > > test app: > > http://tinyos.cvs.sourceforge.net/tinyos/tinyos-2.x-contrib/stanford-lgl/apps/TestFTSP/ > > FTSP lib: > > http://tinyos.cvs.sourceforge.net/tinyos/tinyos-2.x-contrib/stanford-lgl/libs/FTSP/ > > brano > > renjie huang wrote: > > Hi paul > > > > In which directory can I find the code of FTSP for T2? Thanks > > > > On Fri, Apr 11, 2008 at 12:52 AM, Branislav Kusy <[EMAIL PROTECTED] > <mailto:[EMAIL PROTECTED]>> wrote: > > > > hi paul, > > > > i haven't really written timer routines - they are part of T2. i was > > only testing FTSP for micaZ and the component that provides TMicro > > counter for micaZ is tos/platforms/mica/CounterMicro32C.nc > > > > i just did a quick search and i found > > tos/chips/msp430/Msp430CounterMicroC.nc which provides 16 bit TMicro > > counter. perhaps you can use it? anyways, TMicro on telos platform > is > > much less useful for timesync, since the cpu is turned off whenever > > there is no work to be done (ie. no tasks in the scheduler). thus > your > > TMicro based TimeSync will be inconsistent - the time will not grow > > linearly. > > > > T32khz clock is based on real-time clock, which keeps running > even when > > cpu is in standby. T32khz accuracy should be sufficient for all > > practical purposes. > > > > brano > > > > [EMAIL PROTECTED] <mailto:[EMAIL PROTECTED]> > wrote: > > > Dear Brano Kusy, > > > > > > I had a look at the SenSys'04 paper "The Flooding Time > > Synchronization > > > Protocol". Very interesting. I was pleased to see that you have > > > transferred the software from TinyOS-1.x to TinyOS-2.0. > > > > > > My installed TinyOS-2.0 system does not (yet) comprise the timer > > > routines with "Micro" resolution, but "32khz" resolution is > > available. > > > Three resolutions are promised in my manuals, but only "32khz" > exists > > > really. > > > > > > I wonder if you have the "Micro" library routines (Can I get > them? > > > What's required for their installation?), or did you include them > > in the > > > software in hope for the arrival of a TinyOS version > containing them? > > > > > > Aside: > > > I am using TelosB motes, or actually home-brew derivatives. The > > CPU is > > > an MSP430 and, if you care about such things, its internal timer > > runs at > > > 1048 kHz (MCLK = 32 kHz * 131/4). I have no idea why TI > designed it > > > that way, but this weird factor feeds through to all timers. My > > guess > > > is, TinyOS-2.0 divides MCLK by 32 to get "32khz" (really 32.75 > > kHz) and > > > divides it again by 32 to get "Milli" (really 1.0234 kHz). > > > > > > Best regards from > > > Paul Pilgram. > > > > > > > > > > > _______________________________________________ > > Tinyos-help mailing list > > [email protected] > > <mailto:[email protected]> > > > https://www.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help > > > > > > > > > > -- > > Renjie Huang > > Sensorweb Research Laboratory > > http://sensorweb.vancouver.wsu.edu/ > > Washington State University > _______________________________________________ > Tinyos-help mailing list > [email protected] > https://www.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help >
-- Renjie Huang Sensorweb Research Laboratory http://sensorweb.vancouver.wsu.edu/ Washington State University
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